On a Roamio last night we were watching a recorded show. When it finished I pressed the "Live TV" button and had a completely black screen with no sound. Switched channels a few times with no difference. Tried a different Tivo and everything was fine, so I know I was getting a signal into the house. I went to soft reboot and when I clicked on Restart I got a spinning blue circle. That lasted about 60 seconds and it froze. Then about 30 seconds later the box restarted on its own and returned to normal. Note that when I clicked on "restart" I never got the message to press thumbs down twice. It just rebooted on its own after the freeze. I've been around computers long enough to know that stuff happens, but I was wondering if anyone else has had a similar experience and, if so, was it an indication of a failing drive or just a one-off anomaly.